had one about 2 months after my twins were born. I literally felt like the room was spinning, the walls were closing in on me and my chest was shrinking and I couldn’t breathe. I hide under a blanket on the couch and told my husband I thought I was dying. Freaked my husband out. We ended up calling my OB and they sent me to the local looney bin where I was placed as an inpatient for 5 days. Worst experience of my life.
Get professional help ASAP. You will feel so much better after starting treatment.